Split utilities functions into separate files

src/utilities/transliterate.cpp

@@ -0,0 +1,94 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <string>
+#include <memory>
+#include <cstdio>
+
+#ifdef HAVE_ICU
+#  include <unicode/translit.h>
+#else
+#  include <iconv.h>
+#endif
+
+#include <QByteArray>
+#include <QString>
+
+#include "transliterate.h"
+
+namespace Utilities {
+
+QString Transliterate(const QString &accented_str) {
+
+#ifdef HAVE_ICU
+
+  UErrorCode errorcode = U_ZERO_ERROR;
+  std::unique_ptr<icu::Transliterator> transliterator;
+  transliterator.reset(icu::Transliterator::createInstance("Any-Latin; Latin-ASCII;", UTRANS_FORWARD, errorcode));
+
+  if (!transliterator) return accented_str;
+
+  QByteArray accented_data = accented_str.toUtf8();
+  icu::UnicodeString ustring = icu::UnicodeString(accented_data.constData());
+  transliterator->transliterate(ustring);
+
+  std::string unaccented_str;
+  ustring.toUTF8String(unaccented_str);
+
+  return QString::fromStdString(unaccented_str);
+
+#else
+
+#ifdef LC_ALL
+  setlocale(LC_ALL, "");
+#endif
+
+  iconv_t conv = iconv_open("ASCII//TRANSLIT", "UTF-8");
+  if (conv == reinterpret_cast<iconv_t>(-1)) return accented_str;
+
+  QByteArray utf8 = accented_str.toUtf8();
+
+  size_t input_len = utf8.length() + 1;
+  char *input_ptr = new char[input_len];
+  char *input = input_ptr;
+
+  size_t output_len = input_len * 2;
+  char *output_ptr = new char[output_len];
+  char *output = output_ptr;
+
+  snprintf(input, input_len, "%s", utf8.constData());
+
+  iconv(conv, &input, &input_len, &output, &output_len);
+  iconv_close(conv);
+
+  QString ret(output_ptr);
+  ret = ret.replace('?', '_');
+
+  delete[] input_ptr;
+  delete[] output_ptr;
+
+  return ret;
+
+#endif  // HAVE_ICU
+
+}  // Transliterate
+
+}  // namespace Utilities